The ruins of an early-18th-century complex that could once house up to 12,000 horses.

A mud brick kasbah with a history of lavishness and traitorship.

Designed as a labyrinth, this subterranean prison was crafted without bars or doors.

The best way to get a sneak peek at the movies.

A hot dog stand where the heads are just as hot as the dogs.

An amazing collection of wax anatomical models and terratological models.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

The relics of dozens of martyrs are stored in a single chapel.

This Neapolitan exhibition hall grants weird and wonderful insight into the intricacies of human biology.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

The steepest classic funicular in the world glides along a dizzying incline.

A massive observation tower that features gorgeous views and unique architecture.

This eclectic architectural gem played witness to Zurich’s colonial past.

Constructed along the shores of Lake Zurich, this pavilion is a walk-through work of art.

Founded as a refugee camp, now a popular tourist spot.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

The designated Jewish quarter in Fez dates back to the 15th century.

God's Saharan sandbox of wrath.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

An abandoned horror film set sits eerily along a highway through Hollywood's "door to the desert."

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

Gorgeous views of Italian mountains and valleys form the backdrop of this unique open-air theater.